a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy. b. In NMR we

Question:

a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy.

b. In NMR we use solvents such as tetrachloromethane to prepare samples for the machine (Figure 29.16).

i. What is the molecular formula of tetrachloromethane?

ii. Why do you think tetrachloromethane is used as a solvent?

iii. Solvents that contain deuterium, D, are also used as solvents in NMR. Deuterium is the isotope ²H. A substance in which ¹H is replaced by ²H is said to be deuterated. Why would the deuterated solvent CDCl₃ be used instead of CHCl₃?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Cambridge International AS And A Level Chemistry Coursebook

ISBN: 9781316637739

2nd Edition

Authors: Lawrie Ryan, Roger Norris

See More Books

Question Posted: Sep 24, 2021 02:49 AM

See More Questions

What is the molecular formula of the following compound? Empirical formula: CH ( = 78.11 g/mol):
What is the molecular formula of each of the following compounds? (a) Empirical formula CH2, molar mass = 84 g/mol (b) Empirical formula NH2Cl, molar mass = 51.5 g/mol
What is the molecular formula of each of the following compounds? (a) Empirical formula HCO2, molar mass = 90.0 g/mol (b) Empirical formula C2H4O, molar mass = 88 g/mol
"If nominal GDP rises, velocity must rise." Is this statement true, false, or uncertain? Explain your answer.
A project requiring an immediate investment of $150 000 and a further outlay of $40 000 after four years have a residual value of $30 000 after nine years. The project yields a negative net return of...
1. Has Anita Roddick betrayed her philosophy about advertising by beginning to advertise in U.S. markets? Does this decision have ethical implications? Or is it just a business decision? 2. Would you...
What are the six bottleneck principles discussed in the text? LO.1
Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platform (Forbes website, April 10, 2012). But does trust in Pinterest differ by...
Seth Fitch owns a small retail ice cream parlor. He is considering expanding the business and has identified two attractive alternatives. One involves purchasing a machine that would enable Mr. Fitch...
You, CA, have been working for Plener and Partners, Chartered Accountants (P&P), a mid-size CA firm, for three years. You have been assigned a new project for a long-term client of your firm, Oxford...
Predict the number of peaks and the relative areas under each peak, where appropriate, on the low resolution proton NMR spectrum of: a. Methanol, CH 3 OH b. Benzene, C 6 H 6 c. Chloroethane, C 2 H 5...
Compound B has the composition 62.1% carbon, 10.3% hydrogen and 27.6% oxygen. Its mass and 1H NMR spectra are shown below. a. b. a. Calculate the empirical formula of B. b. From the mass spectrum,...
Suppose the U.S. supply and demand curves for automobiles cross at a price of $15,000 but (identical) automobiles can be purchased from abroad for $10,000. Now suppose the government imposes a $2,000...
You have recently taken over daycare center that was under substandard leadership. Currently, the staff is unmotivated, negative, and often absent from work. You notice that there is minimal...
Choose an organization from the industry of your choice to discuss, illustrate, and reflect deliberately on the following: Why is it important to distinguish between "group" and "team "? What kinds...
The focus of data governance programs, in some capacity, is enterprise-wide data quality standards and processes. If you were a manager focusing on master data: Would you likely meet enterprise-level...
1) Identify and explain each component of the ANOVA model. 2) How is the F ratio obtained? 3) What role does the F ratio play?
Make a BCG matrix table and place the following products from Apple: iPhone, iPad, iMac, iPod, Apple TV, Apple Watch, AirPod, and HomePod. Briefly describe why you have placed the products in the...
Roger R. and Michelle N. Stewart (ages 45 and 46) are married and live at 641 Cody Way, Casper, WY 82609. Roger is a consulting engineer, and Michelle is a paralegal. They file a joint return and use...
As economic conditions change, how do banks adjust their asset portfolio?
The molar heat capacity C P,m of SO 2 (g) is described by the following equation over the range 300 K < T < 1700 K: In this equation, T is the absolute temperature in kelvin. The ratios T/K ensure...
Use the relation (U/V ) T = T(P/T) V P and the cyclic rule to obtain an expression for the internal pressure, (0U/0V )T , in terms of P, , T, and .
A mass of 34.05 g of H 2 O(s) at 273 K is dropped into 185 g of H 2 O(l) at 310.K in an insulated container at 1 bar of pressure. Calculate the temperature of the system once equilibrium has been...
ABC Company engaged in the following transaction in October 2 0 1 7 Oct 7 Sold Merchandise on credit to L Barrett $ 6 0 0 0 8 Purchased merchandise on credit from Bennett Company $ 1 2 , 0 0 0 . 9...
Lime Corporation, with E & P of $500,000, distributes land (worth $300,000, adjusted basis of $350,000) to Harry, its sole shareholder. The land is subject to a liability of $120,000, which Harry...
A comic store began operations in 2018 and, although it is incorporated as a limited liability company, it decided to be taxed as a corporation. In its first year, the comic store broke even. In...

a. Explain why tetramethylsilane (TMS) is used as a standard in NMR spectroscopy. b. In NMR we

Question:

The Figure 29.16 Samples dissolved in a solvent in narrow tubes ready for NMR analysis.

Step by Step Answer:

a Tetra methyl silaneTMS chosen for internal standard in proton NMR becau...View the full answer

Cambridge International AS And A Level Chemistry Coursebook

Students also viewed these Sciences questions